Allthough I'm a firm believer in using real-dos flashing tools for stability reasons, some remarks in this thread made me spend an afternoon to create a windows shell for the windows version of necflash.exe.

The result, WINFlash.exe, should be seen as a preview release of this shell program. Given the beta phase of both programs at this time I would recommend 'playing' with this shell program, but take great caution with the FLASH option!

From the ReadMe file:

WINFlash is a simple MS Windows shell for the NEC firmware
flasher (UniFlash) by Liggy and Herrie. This program does
nothing more than spawning the windows version of NECFlash.exe
as a childprocess. Results from NECFlash.exe are placed in a small
output window that will inform you about the success / failure
of the operation.
The only requirement for this program to run, is to have the
WINDOWS version of NECFlash.exe in the same directory as
WINFlash.exe.

Please be aware of the following:

- Since both programs are still in a beta phase, thing can go
wrong. Most operations are harmless, but the FLASH option
can be dangerous!
- Whenever NECFlash.exe is doing its work, all buttons are
disabled and the blue disk at the upper left corner is
spinning. ALSWAYS wait for the buttons to become active
again and the disk stops spinning. Trying to close/kill
WINFlash when NECFlash.exe is running will cause this
process to be killed also!! This may lead to all kind of
failure.
- This program has been developed and tested on Windows XP
using a NEC ND-2510A burner. Other operating systems or
burners may cause strange behaviour.
- WINFlash relies on the current (0.92) release of NECFlash
in regards to the command line options and certain output.
Future versions of NECFlash may cause WINFlash to behave
unexpectedly.

!! THE AUTHORS OF BOTH PROGRAMS TAKE NO RESPONSIBILITY FOR
ANY PROBLEMS THESE PROGRAMS MAY CAUSE !!

download:
http://www.norocketscience.com/download/WINFlash.zip

Paul